National Rankings

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Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, July 1930

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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
July 1930 1-Month	1.79" (45.47mm)	2.78" (70.61mm)	-0.99" (-25.14mm)	1st Driest	Driest since: 1930	1930
July 1930 1-Month	1.79" (45.47mm)	2.78" (70.61mm)	-0.99" (-25.14mm)	128th Wettest	Wettest since: 1929	1950, 1958
Jun–Jul 1930 2-Month	4.12" (104.65mm)	5.70" (144.78mm)	-1.58" (-40.13mm)	1st Driest	Driest since: 1930	1930
Jun–Jul 1930 2-Month	4.12" (104.65mm)	5.70" (144.78mm)	-1.58" (-40.13mm)	128th Wettest	Wettest since: 1929	1928
May–Jul 1930 3-Month	7.29" (185.17mm)	8.62" (218.95mm)	-1.33" (-33.78mm)	11th Driest	Driest since: 1918	1988
May–Jul 1930 3-Month	7.29" (185.17mm)	8.62" (218.95mm)	-1.33" (-33.78mm)	118th Wettest	Wettest since: 1929	2015
Apr–Jul 1930 4-Month	9.12" (231.65mm)	11.13" (282.70mm)	-2.01" (-51.05mm)	4th Driest	Driest since: 1930	1934
Apr–Jul 1930 4-Month	9.12" (231.65mm)	11.13" (282.70mm)	-2.01" (-51.05mm)	125th Wettest	Wettest since: 1929	2015
Mar–Jul 1930 5-Month	11.10" (281.94mm)	13.64" (346.46mm)	-2.54" (-64.52mm)	6th Driest	Driest since: 1910	1936
Mar–Jul 1930 5-Month	11.10" (281.94mm)	13.64" (346.46mm)	-2.54" (-64.52mm)	123rd Wettest	Wettest since: 1929	1973
Feb–Jul 1930 6-Month	12.84" (326.14mm)	15.78" (400.81mm)	-2.94" (-74.67mm)	3rd Driest	Driest since: 1930	1934
Feb–Jul 1930 6-Month	12.84" (326.14mm)	15.78" (400.81mm)	-2.94" (-74.67mm)	126th Wettest	Wettest since: 1929	2019
Jan–Jul 1930 7-Month	15.42" (391.67mm)	18.09" (459.49mm)	-2.67" (-67.82mm)	6th Driest	Driest since: 1925	1934
Jan–Jul 1930 7-Month	15.42" (391.67mm)	18.09" (459.49mm)	-2.67" (-67.82mm)	123rd Wettest	Wettest since: 1929	2019
Dec 1929–Jul 1930 8-Month	17.63" (447.80mm)	20.43" (518.92mm)	-2.80" (-71.12mm)	6th Driest	Driest since: 1918	1931
	17.63" (447.80mm)	20.43" (518.92mm)	-2.80" (-71.12mm)	122nd Wettest	Wettest since: 1929	2019
	Ties: 1918
Nov 1929–Jul 1930 9-Month	19.59" (497.59mm)	22.66" (575.56mm)	-3.07" (-77.97mm)	6th Driest	Driest since: 1925	1934
Nov 1929–Jul 1930 9-Month	19.59" (497.59mm)	22.66" (575.56mm)	-3.07" (-77.97mm)	122nd Wettest	Wettest since: 1929	2019
Oct 1929–Jul 1930 10-Month	22.19" (563.63mm)	24.83" (630.68mm)	-2.64" (-67.05mm)	14th Driest	Driest since: 1925	1934
Oct 1929–Jul 1930 10-Month	22.19" (563.63mm)	24.83" (630.68mm)	-2.64" (-67.05mm)	114th Wettest	Wettest since: 1929	2019
Sep 1929–Jul 1930 11-Month	24.94" (633.48mm)	27.33" (694.18mm)	-2.39" (-60.70mm)	18th Driest	Driest since: 1925	1934
Sep 1929–Jul 1930 11-Month	24.94" (633.48mm)	27.33" (694.18mm)	-2.39" (-60.70mm)	110th Wettest	Wettest since: 1929	2019
Aug 1929–Jul 1930 12-Month	26.74" (679.20mm)	29.95" (760.73mm)	-3.21" (-81.53mm)	11th Driest	Driest since: 1925	1918
Aug 1929–Jul 1930 12-Month	26.74" (679.20mm)	29.95" (760.73mm)	-3.21" (-81.53mm)	117th Wettest	Wettest since: 1929	2019
Feb 1929–Jul 1930 18-Month	43.21" (1,097.53mm)	45.74" (1,161.80mm)	-2.53" (-64.27mm)	26th Driest	Driest since: 1926	1931
Feb 1929–Jul 1930 18-Month	43.21" (1,097.53mm)	45.74" (1,161.80mm)	-2.53" (-64.27mm)	102nd Wettest	Wettest since: 1929	2019
Aug 1928–Jul 1930 24-Month	56.95" (1,446.53mm)	59.92" (1,521.97mm)	-2.97" (-75.44mm)	21st Driest	Driest since: 1926	1918
Aug 1928–Jul 1930 24-Month	56.95" (1,446.53mm)	59.92" (1,521.97mm)	-2.97" (-75.44mm)	106th Wettest	Wettest since: 1929	2020
Aug 1927–Jul 1930 36-Month	88.05" (2,236.47mm)	89.88" (2,282.95mm)	-1.83" (-46.48mm)	42nd Driest	Driest since: 1927	1956
Aug 1927–Jul 1930 36-Month	88.05" (2,236.47mm)	89.88" (2,282.95mm)	-1.83" (-46.48mm)	84th Wettest	Wettest since: 1929	2019
Aug 1926–Jul 1930 48-Month	121.61" (3,088.89mm)	119.78" (3,042.41mm)	1.83" (46.48mm)	74th Driest	Driest since: 1928	1956
Aug 1926–Jul 1930 48-Month	121.61" (3,088.89mm)	119.78" (3,042.41mm)	1.83" (46.48mm)	51st Wettest	Wettest since: 1929	2019
Aug 1925–Jul 1930 60-Month	149.82" (3,805.43mm)	149.64" (3,800.86mm)	0.18" (4.57mm)	62nd Driest	Driest since: 1929	1934
Aug 1925–Jul 1930 60-Month	149.82" (3,805.43mm)	149.64" (3,800.86mm)	0.18" (4.57mm)	62nd Wettest	Wettest since: 1924	2019

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published January 2023, retrieved on February 3, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings